Casing and tubing head assembly



` eb; 25, 1941. A. J. PENlcK ETAL 2,232,884*

CASING AND TUBING HEAD ASSEMBLY Filed Sept. 27, 1937 4 2322 V I` 2 I A/s2 Planas Feb. 2s, 194i PATE-NT OFFICE Y 2,232,884 cAsING AND TUBING HEADASSEMBLY Arthur J. renick and Kirby T. renier, neusten,

Application September 27, 1937,4 Serial No. '$5,845-

' s claims. (ci. 28s- 22) A This invention relates to a casing andtubing head assembly. l

An object oi the invention is to provide an assembly of the characterdescribed having means for supporting an inner tubing in the outercasing and for forming and maintaining a seal between the outer casingand the inner tubing.

It is another object ofthe invention to provide an assembly of thecharacter described embodying a construction whereby the inner tubingmay be supported on a packing assembly to maintain a iiuid tight sealbetween the tubing and the 'casing with additional packing means above.the tubing suspending means whereby'an additional seal'may beconstantly maintained in case a leak should develop past the packingwhich sustains the tubing.

With the above and other objects in view, the linvention has particularrelation to certain novel features oi construction, arrangement oi partsand use. an example of which is given in this specification andillustrated in the accompanying drawing, wherein: Figure 1 shows a sideelevation'of the assembly shown partly in section. and Figure 2 shows afragmentary cross sectional view taken on the line 2--2 of Figure 1.

In the drawing the numeral I designates the well casing to the upper endof which the casing head 2 is attached. The casing head has an insideannular seat 3 whereon there is seated the metal ring 4. This ring'surrounds the inner tubing 5 and on it there is the packing ring 8which also surroundsV the tubingl and on the packing ring 8 there is anupper metal ring l around the tubing. y.Above the packing assembly 4, 6,l, the head 2 is formed with the counterbore 8 in which there is theslip bowl 9 which rests downwardly 4converging seat III` to receive thevwedge shaped slips II whose inner Sides are toothed to grip'and supportthe tubingi. f

Beneath `the seat 3 there are the lateral iiow lines I2, I2 leading outfrom the head. l The weight oi the tubing li is consequently vsustainedon the packing assembly 4, 8, 1 and thepacking 8 is thus compressed toform a iiuid tight seal vwith the inner tubing 5 and the` casing head2.l

On the casing head there is an adapter casing head andadapter havingwtheregistering flanges I4. I5 to receive the bolts I6, whereby these partsare Secured together andthe joint I between them is broken by the gasketI1 to form a iluid tight seal. The tubing 5 extends above the tubingsupportingv slips Ii and the inside on thel ring 'l and which has 4theinside I3, saidv diameter of the upper end oi the adapter is reduced toclosely surround the tubing. 'I'he reduced upper end ot the adapter hasan inside annular groove I8 to receive an annular packing I9 which ntsclosely ing outwardly from the groove Il are the radial bores v2Q whichcontain reserve supplies 2i of packing.' Threaded into the bores 20 arethe jack screws 22, whose inner ends are blank and work against thereserve supplies 2| of packing. 10 Surrounding the outer ends of thelack screws 22, andmounted in the adapter I3, are thestuffing boxes 23.

In case a leak should develop lpast the packing B, as will occur/in thecourse of time, the packing I8 will still maintain the seal and ifnecessary, from time to time, the jack' screws 22 may be` tightened upagainst the packing 2|, causing it to flow into the groove I8 tosupplement the packing I9 in. said groove so as to' form a complete 20seal between the adapter .I3 and the inner tub'- ing 5. f The tubinghead 24 may be mounted in any conventional manner on the adapter I3 forthe purpose of, supporting the inner tubing 25 from .the hanger 26mounted in the tubing head.

The drawing and description disclose what is now considered to be apreferred form oi the invention vby way ci' illustration only. while theroad principlev of the invention will be deilned by the appended claims.

What we claim is: Y

1. In combination a tubular head member having an inside seat, an innerpipe supported in said head member, annular resilient, nexible sealingmeans in the seat surrounding and iltting closely against the innerpipe, said head member having a radial bore therethrough which-communicates with the Seat, a reserve supply of sealing means in said bore,ajack screw having a threaded connection with the bore and whose innerend is arranged v'opposite said reserve supply to apply pressure theretoinwardly, upon in ward movement of the jack screw wherebythe material oithe reserve supply will be caused to ilow into the seat to compress thesealing means in the seat and replenish the sealing means displaced iromthe seat by'wear.

2. In combination a tubular head member having a passageway therethroughand an inside annular seat formed in the wall o! thepassageway, aninside pipe positioned in the passageway close to the wall of thepassageway adjacent the seat, said member having a radial cylindricalbore therethrough which communicates with the seat, Il

around the tubing s. Leads annular resilientI deformable packingmaterial with the seat. a resilient deformable packing mn..- iilling`the seat and partially filling the bore.` terial iiliing the seat andpartially filling the means for exerting a compressive torce on thebore, means for exerting a compressive force on packing in the boreto'place thev packing matethe packing in the bore to place the 5 rial inthe seat under compression. solely by iluid material in the seat undercompression, solely by l pressure exerted -by the material in said bore.fluid pressure exerted by the material in said to form a seal betweenthe pipe and seat around bore. to forma seal between the pipe and seat,the pipe. said means including s Jack screw having a 3. In combination atubular head member havthreaded connection with the bore and whole 10ing a passageway therethrough and anl inside inner end is arrangedopposite the packing ml0 counter-sunk seat formed in the wall o! thepaa- Y terial to apply pressure thereto inwardly. @0n

sageway. an inside pipe positioned in the pasinward movement of the Jackscrew. sageway close to the wall of the passageway adjacent the seat,said member having a eylindrical ARTHUR J. PEN'ICK. 15 radial boretherethrough which communicates mRBY TrPENICK. ll

